Seal Shield Silver Surf Wireless. Device interface: RF Wireless, Purpose: PC, Recommended usage: Office. Frequency band: 2.4 GHz, Wireless range: 10 m. Wireless receiver interface: USB, Receiver type: nano. Keyboard dimensions (WxDxH): 398 x 219 x 32 mm, Keyboard weight: 0.74 kg. Power source type: Battery, Battery type: AA